1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Although they range from $150-$400 or more, a large capacity (25-70 pints) dehumidifier for a basement (the dampest portion of most homes) or other large area averages $200-$300.
For instance, Frigidaire offers 30 pint dehumidifiers, 50 pint dehumidifiers and 70 pint dehumidifiers. General Electric offers 30 pint, 40 pint, 50 pint and 65 pint dehumidifiers. You can also purchase a whole-house dehumidifier if you need to control moisture throughout the house instead of simply one room.